Mated To A Disabled Alpha

Diana, to save the one thing she adored the most, had to substitute her sister and get married to a Disable, unwanted Alpha, after being rejected by her own mate who choose her elder sister over her. Heartbroken and sad, she discovered this disabled Alpha was her second chance mate, but he also rejected her, and continuously made her life miserable despite they were soon to be married.
Somehow, Diana had a night of pleasure with him, leading her to get pregnant. She thought this would save her marriage and was about to inform her husband but then overheard him, the disabled Alpha, Dante plotting to kill her. Scared for her life, Diana made an escape into another realm where she discovered her true identity and realized everything she knew was a lie.
After she ran away, Dante regretted all his actions and started to desire to have her back but then she was nowhere to be found. Four years after, Diana returned back to the werewolf community, now a powerful Luna about to get Bethrothed to Dante's cousin.
How come?
Will Diana ever forgive Dante especially when her mind is set to ruin him?